Repair Procedure - B

REPAIR PROCEDURE "B"





1. Disconnect Eccentric Shaft Position Sensor (ESPS) B1-27 connector.

NOTE:
This will cut fuel injection & spark while performing the procedure.





2. Remove the front vacuum plug or PCV vacuum hose from the passenger side of the lower intake manifold.

NOTE:
^ 2006 model year and later vehicles have PCV vacuum hoses attached to these ports for the PCV system. Disconnect these hoses from the lower intake manifold ports one at a time when performing this procedure. These hoses do not need to be plugged once disconnected.





3. Fabricate a vacuum line (About 2 feet in length) and attach to front vacuum port as shown in the illustration.

CAUTION:
^ DO NOT attempt to service both vacuum ports at the same time. Perform procedure for front port, then perform procedure for rear port.

4. Add approximately 30cc's of 5W-20 engine oil to a small container.





5. Insert vacuum line into the bottom of the container.

6. Crank over engine until all oil is drawn into the intake manifold. (Do not depress accelerator pedal during this step.)

NOTE:
^ If oil cannot be drawn into engine due to low vacuum, add oil through leading spark plug holes, or use a syringe and inject through vacuum lines & into the intake manifold. Add approximately 30cc's of 5W-20 of engine oil to each rotor.

7. Reinstall leading spark plug if removed during STEP 6.

- On 2004-2005, disconnect vacuum line from intake manifold and reinstall vacuum plug.

- On 2006 model year and later, disconnect vacuum line from intake manifold and reinstall PCV vacuum line.

8. Repeat STEPS 2-7 for rear vacuum port.

9. Connect ESPS connector B1-27.

CAUTION:
If the engine starts during next step, DO NOT race the engine, this may cause catalyst damage.

10. Attempt to start engine without depressing accelerator pedal.

- If engine starts, keep engine running between 1500-2000 RPM until engine speed has stabilized. Maintain this engine speed until all smoke has dissipated and / or engine has come to full operating temperature. Turn engine off and proceed to CARBON REMOVAL PROCEDURE.





- If engine fails to start, check engine compression. Refer to Workshop Manual section 01-10 COMPRESSION INSPECTION. Fill out the ENGINE COMPRESSION WORKSHEET shown above and input vehicle information and your readings on the MXConnect website as instructed on the worksheet. If engine compression is OK, follow diagnosis according to workshop manual section 01-03 - NO. 6 CRANKS NORMALLY BUT WILL NOT START.

NOTE:
When engine compression readings and vehicle information are input to the form on the MXConnect website, the system will automatically determine if the engine requires or does not require replacement based on the compression.

IMPORTANT:
^ If engine replacement is necessary, attach compression test results to the repair order in the form of:

- Printed copy from print capable devices Mazda Rotary Engine Compression Tester 49F0-18-9A0C, WDS compression test function or Mazda Rotary Engine Compression Tester 4908-20-280K.

- Printed digital photo of compression tester screen - Mazda Rotary Engine Compression Tester 49H0-75-280, 49H0-75-280A, 49F0-18-9A0A, 49F0-18-9A0B.